Acronym triddep Name triangular duoexpandoprism,expanded triddip,tegum sum of 2 alternated thiddips Circumradius 2/sqrt(3) = 1.154701 Confer more general: n-dep   general polytopal classes: isogonal Externallinks

Incidence matrix according to Dynkin symbol

```xo3xx ox3xx&#zy   → height = 0
y = sqrt(2/3) = 0.816497
(y-laced tegum sum of 2 alternate thiddips)

o.3o. o.3o.     & | 36 |  1  1  2  2 |  2  2  1  3  4 | 1 1 1  3 2
------------------+----+-------------+----------------+-----------
x. .. .. ..     & |  2 | 18  *  *  * |  2  0  0  2  0 | 1 0 1  2 0
.. x. .. ..     & |  2 |  * 18  *  * |  0  2  0  0  2 | 0 1 0  1 2
.. .. .. x.     & |  2 |  *  * 36  * |  1  1  1  0  1 | 1 1 0  1 1
oo3oo oo3oo&#y    |  2 |  *  *  * 36 |  0  0  0  2  2 | 0 0 1  2 1
------------------+----+-------------+----------------+-----------
x. .. .. x.     & |  4 |  2  0  2  0 | 18  *  *  *  * | 1 0 0  1 0
.. x. .. x.     & |  4 |  0  2  2  0 |  * 18  *  *  * | 0 1 0  0 1
.. .. o.3x.     & |  3 |  0  0  3  0 |  *  * 12  *  * | 1 1 0  0 0
xo .. .. ..&#y  & |  3 |  1  0  0  2 |  *  *  * 36  * | 0 0 1  1 0  (xxy)
.. xx .. ..&#y  & |  4 |  0  1  1  2 |  *  *  *  * 36 | 0 0 0  1 1  (xyxy)
------------------+----+-------------+----------------+-----------
x. .. o.3x.     & |  6 |  3  0  6  0 |  3  0  2  0  0 | 6 * *  * *  trip
.. x. o.3x.     & |  6 |  0  3  6  0 |  0  3  2  0  0 | * 6 *  * *  trip
xo .. ox ..&#y    |  4 |  2  0  0  4 |  0  0  0  4  0 | * * 9  * *  2ap variant
xo .. .. xx&#y  & |  6 |  2  1  2  4 |  1  0  0  2  2 | * * * 18 *  wedge-like trip variant
.. xx .. xx&#y    |  8 |  0  4  4  4 |  0  2  0  0  4 | * * *  * 9  4p variant
```